Description
Overview
Upgrade your FN PS90 with the Haga Defense Gen 4 Front Handguard — a lightweight, receiver-mounted M-LOK platform made from high-strength nylon. It converts the exposed barrel area into functional accessory space, adds forward grip options, improves handling, and gives your rifle a modern profile without unnecessary weight.
Choose Your Version
Standard (Narrow)
- M-LOK slots on top, sides, and bottom for lights, lasers, and grips.
- 4.6 oz (approx.) — ultra-light yet durable.
- Best for non-suppressed PS90s — no suppressor clearance under the handguard.
- Attaches directly to the receiver with included hardware; does not contact the barrel.
Suppressor-Compatible (Wide)
- Suppressor clearance up to 1.7″ diameter (fits most PS90 suppressors).
- M-LOK slots on top and sides for flexible accessory mounting.
- 3.7 oz (approx.) with a compact ~4.2″ profile.
- Also works great on PS90s with a standard 16″ barrel and no suppressor.
Shared Features
- Lightweight nylon construction designed for strength and reliability.
- Easy installation with included hardware — no permanent modifications.
- Compatible with all PS90 receiver widths (older ~31mm and newer ~33mm).
- Allows tool-less field stripping once installed.
- Made in the USA
Important Notes
- M-LOK rails and accessories are sold separately (no longer pre-installed).
- Some side-mounted accessories may require shorter screws due to barrel proximity.
Feature Comparison
Standard (Narrow)
- M-LOK slots on top, sides & bottom
- 4.6 oz (approx.)
- Best for non-suppressed PS90s
- Receiver-mounted; does not contact barrel
- Tool-less field strip once installed
- Fits older (~31 mm) & newer (~33 mm) receivers
- M-LOK rails sold separately
- Made in the USA
